Commit fc1bfdfd authored by Richard Henderson's avatar Richard Henderson Committed by Richard Henderson
Browse files

tcg/arm: Expand epilogue inline



It is, after all, just two instructions.

Profiling on a cortex-a15, using -d nochain to increase the number
of exit_tb that are executed, shows a minor improvement of 0.5%.

Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent d6fa50f5
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+2 −10
Original line number Diff line number Diff line
@@ -1745,7 +1745,6 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is64)
#endif
}

static tcg_insn_unit *tb_ret_addr;
static void tcg_out_epilogue(TCGContext *s);

static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
@@ -1756,14 +1755,8 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,

    switch (opc) {
    case INDEX_op_exit_tb:
        /* Reuse the zeroing that exists for goto_ptr.  */
        a0 = args[0];
        if (a0 == 0) {
            tcg_out_goto(s, COND_AL, s->code_gen_epilogue);
        } else {
            tcg_out_movi32(s, COND_AL, TCG_REG_R0, args[0]);
            tcg_out_goto(s, COND_AL, tb_ret_addr);
        }
        tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R0, args[0]);
        tcg_out_epilogue(s);
        break;
    case INDEX_op_goto_tb:
        {
@@ -2309,7 +2302,6 @@ static void tcg_target_qemu_prologue(TCGContext *s)
     */
    s->code_gen_epilogue = s->code_ptr;
    tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R0, 0);
    tb_ret_addr = s->code_ptr;
    tcg_out_epilogue(s);
}